tools/opt/BreakpointPrinter.cpp

   1 //===- BreakpointPrinter.cpp - Breakpoint location printer ----------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 ///
  10 /// \file
  11 /// \brief Breakpoint location printer.
  12 ///
  13 //===----------------------------------------------------------------------===//
  14 #include "BreakpointPrinter.h"
  15 #include "llvm/ADT/StringSet.h"
  16 #include "llvm/IR/DebugInfo.h"
  17 #include "llvm/IR/Module.h"
  18 #include "llvm/Pass.h"
  19 #include "llvm/Support/raw_ostream.h"
  20
  21 using namespace llvm;
  22
  23 namespace {
  24
  25 struct BreakpointPrinter : public ModulePass {
  26   raw_ostream &Out;
  27   static char ID;
  28
  29   BreakpointPrinter(raw_ostream &out) : ModulePass(ID), Out(out) {}
  30
  31   void getContextName(const DIScope *Context, std::string &N) {
  32     if (auto *NS = dyn_cast<DINamespace>(Context)) {
  33       if (!NS->getName().empty()) {
  34         getContextName(NS->getScope(), N);
  35         N = N + NS->getName().str() + "::";
  36       }
  37     } else if (auto *TY = dyn_cast<DIType>(Context)) {
  38       if (!TY->getName().empty()) {
  39         getContextName(TY->getScope().resolve(), N);
  40         N = N + TY->getName().str() + "::";
  41       }
  42     }
  43   }
  44
  45   bool runOnModule(Module &M) override {
  46     StringSet<> Processed;
  47     if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.sp"))
  48       for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
  49         std::string Name;
  50         auto *SP = cast_or_null<DISubprogram>(NMD->getOperand(i));
  51         if (!SP)
  52           continue;
  53         getContextName(SP->getScope().resolve(), Name);
  54         Name = Name + SP->getName().str();
  55         if (!Name.empty() && Processed.insert(Name).second) {
  56           Out << Name << "\n";
  57         }
  58       }
  59     return false;
  60   }
  61
  62   void getAnalysisUsage(AnalysisUsage &AU) const override {
  63     AU.setPreservesAll();
  64   }
  65 };
  66
  67 char BreakpointPrinter::ID = 0;
  68 }
  69
  70 ModulePass *llvm::createBreakpointPrinter(raw_ostream &out) {
  71   return new BreakpointPrinter(out);
  72 }